If your Trillium
has the original electrical
equipment, the outlet near the door is of course 110 vac, while the interior lights
are part of the 12 vdc system. With original Trillium
wiring, the 12 vdc system is simple:
(1) a press button circuit breaker and a battery/transformer rocker switch (black) on the right side of the converter box front panel
(2) a transformer inside the converter box
The converter box also has a 110 vac circuit breaker on the left side of the converter box front panel.
The rocker switch should be in the transformer or "TRANS" position.